Radial saw



Feb. 5, 1952 Q GESNER 2,584,863

RADIAL SAW Filed Nov. 26, 1946 3 Sheets-Sheet 1 Emma tom Feb. 5, 1952 c p GESNER 2,584,863

RADIAL SAW Filed Nov. 26, 1946 3 Sheets-Sheet 2 3mm 63 Carleton R Gesner.

as? mj/ iwmd Patented Feb. 5, 1952 UNITED STATES 'araur orrlce RADIAL SAW Carleton Peck Gesner, New Haven, Conn.

Application November 26, 1946, Serial No. 712,275

3 Claims.

This invention relates to radial saws and more particularly to a radial saw having a work supporting table, a swinging arm overhanging the table, and a motor driven saw, or like tool, reciprocably mounted on the arm. In such machines it is desirable that the arm, when swung to the position desired, be securely locked while the saw is being used. It is also desirable that the motor, with the tool driven thereby, be capable of reciprocation along the arm and swingable in both horizontal and vertical planes. While a circular saw is usually used in machines of this type, other rotatable tools, such as routers, shapers, drills and. the like, may also be efficiently used.

In view of the various uses for a machine of this type, it is desirable that the same be constructed to adapt it for any one of such uses, and to accurately locate and securely lock the parts in the operative positions and, therefore, it is one object of this invention to improve the structure of such machines whereby such desideratum will be efiiciently obtained.

Another object of this invention is to generally improve the structure of a machine of the above nature whereby it may be conveniently operated and controlled.

Still another object of this invention is to provide improved locating and locking devices in machines of the above type.

A further object is to provide an improved radial saw, or like machine, which will be relatively inexpensive to manufacture, simple in construction, of a minimum number of parts, compact, convenient to operate, pleasing in appearance, and very efficient and durable in use.

With the above and other objects in view, which will appear as the description proceeds, there has been illustrated in the accompanying drawings, one form of machine of the above nature in which the features and principles of this invention may be conveniently and practically embodied.

In the drawings:

Figure 1 is a side elevational view of a radial saw embodying the features and principles of this invention;

Figure 2 is a broken front elevational view of the same;

Figure 3 is a top plan view of the same;

Figure 4 is a sectional view through the swingable arm taken on the line 4 of Figure 1;

Figure 5 is a, sectional view through the arm supporting casing taken on the line 5-5 of Figure 1;

gu e 6 is a ecti a ew ta en prime 6 6 2 of Figure 2, the section being only through the armand motor support at the arm and at the ends of the motor casing;

Figure 7 is a cross-sectional view taken on the line of Figure l; and

Figure 8 is a cross-sectional view taken on the line 8-8 of Figure 1.

Referring now to the drawings wherein like reference numerals designate like parts throughout the several views, the reference numeral M denotes a main supporting frame adapted to be supported from a floor by legs l2. A work supporting table I3 is disposed over the frame The table It is secured to the frame for vertical and lateral adjustment by means of adjusting bolts I4 and bolts I5 respectively. The bolts 4, one adjacent each corner of the table l3, pass through angle pieces I6 secured to the table I3 and angle pieces I! secured to the frame The bolts I5 one adjacent each rear corner of the table l3 pass through angle pieces |8 secured to the table i3 and angle pieces I 9 secured to the frame Adjustment of any one or all, of the bolts M will adjust the table l3 in respect to the frame II, to level the table l3 and/or to square it with the tool, or saw 2|. The table l3 has a work guiding fence 22 detachably secured thereto and adjustment of the bolts |5 will adjust the table and through it the fence 22, which extends upwardly from the top surface of the table |3 at right angles thereto, square with the tool, or saw 2|, either when the saw 2| is in the position shown, or when it is laterally swungat right angles to such position. The fence 22 is disposed across the table l3 in a slot 23, and is detachably secured in place by wedges 24 and 25.

The tool, or saw 2|, is mounted on an end of the shaft 26 of an electric motor 21. The motor 21 is pivotally supported on a yoke 28. The motor 21 is provided with plate-like lugs 29 and 3|, one on either side of its casing. Front and rear yoke plates 32 and 33 are bolted to the lugs 29 and 3| respectively. The plates 32 and 33 have trunnion extensions 34 and 35 which have hearings in the lower ends 36 and 31 respectively of the yoke 28 (see Figures 1 and 6). A circular motor dial plate 38 is secured to the motor lug 29 by a handle 39 and to the yoke plate 32 by pins 4|. The dial plate 38 has locating notches 42, 43, and 44 (Fig. 4) cut into its periphery into which a catch 45 may be engaged to locate and lock the motor 27 in any one of three positions when it is rotated in the yoke ends 36 and 31, the positions being when the axis of the motor shaft 26 is vertical, at a 45 degree angle, or horizontal. The

catch 45 is pivoted at 46 on a hand gripping extension 4'I' extending forwardly from the yoke 28 and has a manually engageable actuating handle 48.

The yoke 28 is pivotally hung from a carriage structure by a bolt 49 the head of which rests on a carriage frame 52 with the body of the bolt 49 extending downwardly through a carriage dial plate 53 and then through the yoke base 54. A nut 55 clamps the parts together. The plate 53 is bolted to the yoke 28 by bolts 55. The upper portion of the carriage dial plate 53 is circular and has three notches 51, 58 and 59 formed in its peripher (see Figures 1, 2, and 6). The notches 5'! and 59 are 180 degrees apart and notch 58 is midway between them 95 degrees from each whereby the yoke 28 with the motor 21 may be swung on the bolt 49 and properly located by a catch 6|, adapted to en gage in the notches in any of the three posi tions in respect to the carriage, or with the table I3. The catch 6| is pivoted by a pin 52 (Fig. 4) to a lug 63 extending outwardly from the carriage frame 52. The catch 8| has an outwardly extending hand engaging portion 54 and an upwardly extending movement control lug 65, the use of which will be hereinafter described.

The tool and motor supporting carriage frame 52 is adapted to be reciprocated within a hollow arm 66 which extends forwardly and overlies the table top I5. The arm 86 is inverted U shaped in cross-section and has inwardly directed transversely spaced apart flat tracks 87 and 98, see Figure 4, one separately secured upon the lower edge face of each side of the arm and extending substantially the length of the arm. A cover plate 16, see Figure 2, is detachably secured as by screws onto the front end of the arm 66 to cover the same and also the ends of the tracks 61 and 68. Straight faced rollers 69 and II, see Figure 4, freely rotatable on a shaft 72 supported by, and each side of, the carriage frame 52 ride on the tracks 61 and 68. track 13 at the top within the arm 66 is engaged by a swinging roller I4, one at each end of the carriage frame 52 to guide the carriage along the arm. A screw-threaded stud I5 threaded through a pin I6 is adapted to engage a bracket 11, in which the roller I4 is mounted, to press the roller I4 against the track I3 and in so doing maintain the rollers 68 and 1| upon the tracks 81 and 68. The structure of the tool carriage illustrated is shown and described in detail in a pending application of Edwin E. Gcsner, Serial No. 706,856, filed October 31, 1946.

The track 88 has a notch I8 provided in its outer edge adjacent the forward end of the track to receive the movement control lug 65 of the catch 6|, whereby the catch 6| may be raised to be disengaged from any one of the notches 51, 58, and 59 in the dial plate 53. The catch 5| is retained in whichever one of the notches 5T, 58 and 59 it is disposed due to the movement control lug 65 engaging the side edge of the track 68 during the movement of the carriage 52 in the arm 66. Thus the catch 6| can only be raised for convenient and safe disengagement with the notches 57, 58, and 59 when the carriage is in its forward position in the arm 66, and the tool, or saw, is entirely removed from the work. The carriage frame 52 has a lug I8 extending rearwardly therefrom to receive a rod 8| which extends laterally across the carriage and beyond the sides of the arm 66 (Fig 5). A clamp piece 82 is securely fastened at. one, e

Another spect to the cylinder 86.

of the rod 8| and a clamp piece 83 is slidably mounted on the other end of the rod 8|. This latter end of the rod 8| is screw-threaded to threadingly receive a hand operated clamp nut 84. Each of the clamp pieces extend upwardly from the rod 8| to overlie the respective side edges of the arm 66 at the tracks 61 and 68 so that upon tightening of the clamp nut 84 the clamp pieces 82 and 83 are engaged against the outer edges of the tracks 6'! and 68 to securely lock the carriage frame 52 in the position along the arm 66 to which the carriage has been moved and desired to be held while the machine is operated.

The rear end of the arm 66 is formed integral with, or, as shown, secured to the upper end of a column 85 which is slidingly mounted for vertical movement in a cylinder 86 secured to and extending upwardly from the upper surface of the frame II to the rear of the table I3, The column 85 is hollow and at its lower end is pro vided with a cross-web 81 (Fig. 5) through which a screw threaded hole 88 is formed to receive a vertically extending threaded shaft 89. The web 8'! is provided with vent and oil holes 98 (Figs 7 and 8). The column 85 passes through a circular dial collar 9I, being keyed thereto to prevent relative rotation by a key 92 secured to the collar 9| by a screw 93 and sliding in a key slot 94 formed in the column 85. The slot 94 extends along the column to allow sliding covement of the column in the cylinder 86 and through the collar 9|. The dial collar 9| is pro vided with a circular boss 95 which extends into a counterbore 96 in the upper end of the cylinder 86, and is held in place by screws 91 extendinfi into an annular groove 98 provided about the periphery of the annular boss 95 whereby the column 85 and dial collar 9| may rotate in re-' The dial collar 9| has threenotches 99, IOI, and I82 formed in its periphery to receive a catch I83 (see Figure 7)" whereby the column 85 and with it the arm 68 may be quickly located and securely held in any one of three positions in which it may be ro' tated in respect to the cylinder 86 and the table The catch I03 is secured on a shaft I84 having bearings in the upper portion of ears I85 and I86 extending outwardly from the cylinder 86, and a crank arm I81 is secured to one of its outer ends. A link rod I88 is pivoted to the crank arm I81 and extends downwardly to be pivoted to an arm (see Figures 1 and 2) of a bell crank pivoted to the frame II at I89. The other end of this bell crank is pivoted to a rod III which extends forwardly and has its forward end pivoted to a crank arm pivoted to the frame II and having a handle I|2 extending forwardly from the frame II.

To securely lock the column 85 with the arm 66 in any other rotated position in respect to the cylinder 88 and the table I3, means is provided to clamp against the column 85 within the cylinder 86. This column clamping means includes a pair of cylindrical slides H3 and H4- (Fig. 8) slidingly supported in the lower portions H5 and IIS respectively of ears I85 and I86, which extend outwardly from the wall of the cylinder 86 said slides extending into the cylinder. The slides Ilsand I|4 are each provided with a transverse arcuate cut III at op posing ends, the radius of said cuts III bein the same as the radius of the column 85 to adapt the slides H3 and H4 to firmly engage the periphery ofand to clampingly grip, the column 85 wh n they are drawn toward each other. The slide [13 is provided witha threadedhole I'I8;to receive the threaded'end-of a shaft I 9 which extends through a hole" 12 I; provided in the slide I14." A collar I22 provided on the shaft II9 attheouter end oftheslide I I4 engages this slide whenthe shaft I I9 is-r'o'tated to draw the slide H3 toward the slide II' I'to' securely grip the column '85. I g I The shaft ll9,'carrying the slides H3 and I I4, has a crank arm I23 secured to its outer end (see Figures 1' and 2) to which 'is' pivoted alink rod I24. The link rod I24 extends downwardly to be pivoted to an arm I25 of a bell crank pivoted to the frame II at I26. The other arm I21 of this bell crank is pivoted to a rod I28 which extends forwardly to be pivoted to a crank arm I29 pivoted at I3I to the frame II and which has a handle I32 extending forwardly from the frame II. In Figure 1 the bell crank pivoted at I 09 to which the link rod I98 is pivoted, the rod III extending forwardly from this bell crank, and the crank arm to which the rod III is pivoted are directly in line transversely with, and are similar in shape to, the bell crank arm I25, the rod I28 and the crank arm I29 above described.

The column 85, and with it the arm 66 is raised and lowered in respect to the cylinder 86 and the table I3 by rotating the screw threaded shaft 89 (see Figure 5). This is accomplished by turning a crank handle I33, extending out from the forward face of the frame II. The handle I33 is integral with, or secured to a shaft I34 which extends rearwardly from the handle and into a gear casing I35 secured to the bottom end of the cylinder 86. A spiral toothed gear I36 is secured to the shaft I34 within the casing I35 and meshes with a spiral toothed gear I31 secured to the lower end of the threaded shaft 89. A plate I38 located and clamped between the gear casing I35 and the lower end of the cylinder 86 forms a support for a bearing I39 for the threaded shaft 89, the lower end of the shaft being journaled in a thrust bearing I4I seated in a counterbore I42 in the bottom of the gear casing I35.

A push button off and on switch I43 (see Figure 1) is located on the front face of the frame II to control the operation of the motor 21 through an electric cable I44. The switch I43 is suitably connected to a source of electrical energy. A suitable guard I45 for the saw 2| is mounted for swinging movement on a circular hub I46 (Fig. 4) of the motor 21 and is adapted to be clamped in place thereon in any of its swung positions by means of a hand grip I41 on the upper end of a clamp rod I48 and above the extreme upper portion of the periphery of the guard I45.

The machine above described is especially convenient to operate as all controls for the locks, clamps and actuating means are located at or adjacent to the forward face of the machine, readily accessible to an operator. The arm raising handle I33, the locating dial catch handle I I2 and the column clamping handle I 32 with the motor control switch I43 are in front upon the face of the frame I I. The motor dial catch 45 and rotating handle 39 are directed forwardly from the yoke 28 and the carriage dial catch GI and carriage clamp hand nut 84 are accessibly located to the right of the arm 66 above the yoke 28. The guard clamp hand grip I41 is readily accessible to the left of the arm 66 above the guard I45. The quickly operable locating catches and 'clafmps are efli'clently and simply constructed and areparticularly durable in use. 2

While there'h'as" been shown and described herein a mechanism inwhich the features and principles of this invention may be embodied,

it will be understood that the same may be eni-.

embodiment be considered in all respects as illus-' trative, and not restrictive, reference being had to the :claims rather than to the foregoing description to indicate the scope of. the invention.

Having thus fully disclosed the invention, what is claimed as new and for which it is desired to secure LettersPatent, is: I

1. In a radial saw, the combination of a frame, a work supporting table on said frame, a cylinder, open only at its upper end, supported by said frame, a column freely slidable and rotatable in said cylinder, an arm fixed to the upper end of said column to positively move therewith and extending over said table, a circular saw mounted on the arm for movement lengthwise thereof, a dial collar having notches in its periphery rotatably mounted at and secured to the upper end of said cylinder against vertical movement in respect thereto and keyed to said column for rotation therewith, means in said cylinder to raise and lower said column in said cylinder and through said collar, means secured to said cylinder to engage the notches in said dial collar to lock the column in predetermined rotated position, means carried by said cylinder and entering the same to engage said column to lock it in any desired rotated and vertically moved position, actuating means for said column raising and lowering means, actuating means for said predetermined position column locking means, actuating means for said desired position column locking means, and means located outside of the front face of said frame for individually operating each of said actuating means.

2. In a radial saw, the combination of a frame, a work supporting table on said frame, a cylinder, open only at its upper end, secured to the frame at the rear of said table and extending upwardly therefrom, a column freely slidable and freely rotatable in said cylinder, said column having an arm extending forwardly therefrom and with its rear end fixed to the upper end thereof to move and rotate therewith, a dial collar keyed to said column and axially secured to said cylinder to only rotate with the column in respect to the cylinder, said collar having notches in its periphery, a catch member pivoted to the outer wall of said cylinder in position to engage in said dial collar notches, an operating handle pivoted to the front face of said frame substantially midway between the sides of the table, means to operatively connect said catch to said operating handle, opposing clamp members mounted on said cylinder and entering the same, said clamp members being movable toward each other to simultaneously engage said column at adjacent spaced points to lock it in any of its rotated, or axially moved, positions in respect to said cylinder, an operating handle pivoted to the front face of said frame substantially midway between the sides of said table, means to operatively connect the last mentioned handle to said column clamping members, a threaded shaft extending upward- 1y into said cylinder, a threaded web in said column to receive and be engaged by said threaded shaft to raise and lower said column when said shaft is rotated, means in saidycylinder at the lower end of sai'dfshaft-to' rotate said shaft, an operating member rotatably mounted at the front face of said frame substantially midway between,

7 REFERENCES 'CI'TED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 9 4 Carter ;-'-;...-a..- Klausmeyer Feb. 28, 1923 Belnap- Nov. 19, 1929 Gatzsch Feb. 25, 1930 Wieden Apr. 5 1932 Knapp -1 Nov. 26, 1935 Knapp Nov. 26, 1935 Atwood May 20, 1941 Ocenasek Mar. 2, 1943 Mowery et a1. Sept. 14, 1943 Penney Aug. 22, 1944 Emmons Jan. 16, 1945 

